When the node_modules cache hits, npm ci is skipped and the prepare
lifecycle (svelte-kit sync) never runs. frontend/tsconfig.json extends
.svelte-kit/tsconfig.json which only exists after svelte-kit sync —
so ESLint fails at tsconfig resolution on every cache-warm run.
Adding an unconditional svelte-kit sync step after Paraglide compile
and before Lint ensures .svelte-kit/tsconfig.json is always present
regardless of cache state.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>